Home / 12,471,976.70-18,707,965.05-7,664,075.90

Finding the Fourth Proportional to 12,471,976.70, 18,707,965.05 and 7,664,075.90

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Solution

The fourth proportional to 12,471,976.70, 18,707,965.05 and 7,664,075.90 is: 11,496,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471,976.70 : 18,707,965.05 = 7,664,075.90 : x
  2. Step 2: Convert to fraction form
    12,471,976.70/18,707,965.05 = 7,664,075.90/x
  3. Step 3: Cross multiply
    12,471,976.70x = 18,707,965.05 × 7,664,075.90
  4. Step 4: Simplify right side
    12,471,976.70x = 143,379,264,077,747.31
  5. Step 5: Solve for x
    x = 143,379,264,077,747.31/12,471,976.70
  6. Step 6: Final answer
    x = 11,496,113.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.